Toray Industries, Inc.

Takehiko Miyoshi

Kazuya Matsumura

Koji Kawakami

Kenzo Kubo

Tatsuro Mizuki

Daisuke Yahata

Motokatsu Nishimura

Masakatsu Umeda

Shinnichi Nishihata

Tadayuki Matsumoto

Makoto Nakahara

Takuji Sato

Keizo Sano

Kiyoshi Aihara

Toyohiko Masuda

Yoshinori Horii

Tai Sasamoto

The present invention relates to multifilament crimped yarn comprising an aliphatic polyester and methods for producing thereof, and to carpets that are manufactured by using the crimped yarn. The present invention provides an aliphatic polyester multifilament crimped yarn for the carpets comprising an aliphatic polyester having a melting point of equal to or higher than 130&#xb0; C., said multifilament crimped yarn having crimp elongation rate of the multifilament crimped yarn after being processed with boiling water of 3-35% and breaking strength of 1-5 cN/decitex.

Aliphatic polyester multi-filament crimp yarn for a carpet, and production method thereof

The present invention relates to multifilament crimped yarn comprising an aliphatic polyester and methods for producing thereof, and to carpets that are manufactured by using the crimped yarn. The present invention provides an aliphatic polyester multifilament crimped yarn for the carpets comprising an aliphatic polyester having a melting point of equal to or higher than 130&deg; C., said multifilament crimped yarn having crimp elongation rate of the multifilament crimped yarn after being processed with boiling water of 3-35% and breaking strength of 1-5 cN/decitex.

Provided are a dust-collecting filter cloth that comprises a base fabric and web, wherein at least the web includes modified cross-section fibers of polyphenylene sulfide; and a bag filter made of the filter cloth. When fitted to an exhaust gas dust collector, the bag filter involves little pressure loss and ensures increased dust-collecting efficiency. As being resistant to heat and ensuring good dust-collecting efficiency, the filter cloth is useful for dust collection.

Dust collecting filter cloth and bag filter

A nonwoven fabric is formed of polyphenylene sulfide fibers impregnated with a synthetic resin by 5 to 50 wt % based on the total weight of the nonwoven fabric, and has stiffness based on the Gurley method specified in JIS L 1096 of 3000 to 10000 mgf, and can be used as a filter medium for collecting hot dust emitted from refuse incinerators, coal boilers, metal melting furnaces, and others.

Fabric from impregnated polyphenylene sulfide fibers

Polyester monofilament

Rubber-reinforcing polyester fiber and process for preparation thereof

A polyester fiber having a tenacity of at least 4.0 g/d is formed from a copolyester having a degree of polymerization of from 80 to 100 of which copolyester 1.0 to 2.0 mol % of its acid component has a metal sulfoisophthalic group and 0.5 to 1.9 weight % of which copolyester is provided by a glycol component provided by glycol having a molecular weight of from 400 to 6000. The polyester fiber is readily dyed with basic dyes. The polyester fiber can be prepared by spinning the copolyester at a shear rate of.ltoreq.10.sup.4 sec.sup.-1, a spinning draft ratio of .ltoreq.250, a back pressure of the spinneret of.gtoreq.40 kg/cm.sup.2 and a shear stress of .ltoreq.(Q+0.7).times.10.sup.7 dyne/cm.sup.2, where Q is the mass output rate per single hole (g/min).

Polyester fiber and method for the production thereof

Growing community of inventors

Tokyo, Japan

Takehiko Miyoshi